What is the opinion of Reddit about the
Keychron K4 Wireless Bluetooth/USB Wired Gaming Mechanical Keyboard, Compact 100 Keys RGB LED Backlit Gateron Blue Switch N-Key Rollover, Aluminum Frame for Mac Windows?

I don’t think it’s wireless?

You could look at getting a Keychron instead. They have a lot of different wireless models. Each for different keyboard layouts and low profile vs standard.

You can get the standard variants on Amazon or import it from the Keychron website for a customized variant (or if you want hotswappable switches)

https://www.amazon.ca/dp/B07WTCK2RS/ref=cm_sw_r_cp_api_glt_i_SDW9KZ6APPS6CGC0MHFS

https://www.keychron.com/products/keychron-k6-wireless-mechanical-keyboard